// Copyright (c) 2022 CINN Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#pragma once

namespace cinn {
namespace common {

/**
 * Singleton to handle Python interpreter life time, since
 * pybind11::initialize_interpreter and pybind11::finalize_interpreter cannot be
 * called initialization again after finalization, this singleton calls
 * pybind11::finalize_interpreter when it constructs and calls finalization when
 * it destructs.
 *
 * In this case, every caller can call this guard to make sure the pybind11
 * Python interpreter is alive.
 */
class PythonInterpreterGuard {
 public:
  // Destructor
  ~PythonInterpreterGuard();

  // Singleton get instance
  static PythonInterpreterGuard& Guard();

 private:
  // Constructor
  PythonInterpreterGuard();
};

}  // namespace common
}  // namespace cinn
